init

2025-10-09 17:41:57 +00:00
commit 7a3b2960f8
146 changed files with 34948 additions and 0 deletions
@@ -0,0 +1,49 @@
+<?php
+
+namespace Elliptic\Curve;
+
+use Elliptic\Curve\MontCurve\Point;
+use Elliptic\Utils;
+use BN\BN;
+
+class MontCurve extends BaseCurve
+{
+    public $a;
+    public $b;
+    public $i4;
+    public $a24;
+
+    function __construct($conf)
+    {
+        parent::__construct("mont", $conf);
+
+        $this->a = (new BN($conf["a"], 16))->toRed($this->red);
+        $this->b = (new BN($conf["b"], 16))->toRed($this->red);
+        $this->i4 = (new BN(4))->toRed($this->red)->redInvm();
+        $this->a24 = $this->i4->redMul($this->a->redAdd($this->two));
+    }
+
+    public function validate($point)
+    {
+        $x = $point->normalize()->x;
+        $x2 = $x->redSqr();
+        $rhs = $x2->redMul($x)->redAdd($x2->redMul($this->a))->redAdd($x);
+        $y = $rhs->redSqr();
+
+        return $y->redSqr()->cmp($rhs) ===0;
+    }
+
+    public function decodePoint($bytes, $enc = false) {
+        return $this->point(Utils::toArray($bytes, $enc), 1);
+    }
+
+    public function point($x, $z) {
+        return new Point($this, $x, $z);
+    }
+
+    public function pointFromJSON($obj) {
+        return Point::fromJSON($this, $obj);
+    }
+}
+
+?>